from flask import current_app, jsonify
from flask import g
from flask import render_template
from flask import request
from flask import session
from info import constants
from info import redis_store
from info.models import User, News, Category
from info.modules.index import index_blu
from info.utils.response_code import RET
from info.utils.common import user_login_data

@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    :return:
    """
    # 1.获取参数（新闻的分类）
    cid = request.args.get("cid","1")
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")

    # 2.校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    filters = [News.status == 0]
    # 查询的不是最新的数据
    if cid!=1:
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据查询错误")

    # 取到当前页的数据
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page

    # 将模型对象列表转换成
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page":total_page,
        "current_page":current_page,
        "news_dict_li":news_dict_li
    }

    return jsonify(errno=RET.OK,errmsg="OK",data=data)


@index_blu.route('/')
@user_login_data
def index():
    """
    显示首页
    1.如果用户已经登陆，将当前用户的数据传到模板中，供模板显示
    :return:
    """
    # 显示用户是否登陆的逻辑
    # 如果登陆，则取到用户的信息
    # user_id = session.get("user_id",None)
    # user = None
    # if user_id:
    #     # 如果有用户的id，则查询用户的模型
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)
    # data = {
    #     "user": user.to_dict() if user else None
    # }

    user = g.user

    # return render_template('news/index.html', data=data)

    # 右侧的新闻排行的逻辑

    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的是字典
    news_dict_li = []
    # 遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询分类信息，通过模板的形式渲染出来
    categories = Category.query.all()

    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        "user":user.to_dict() if user else None,
        "news_dict_li":news_dict_li,
        "category_li":category_li
    }

    return render_template('news/index.html', data=data)

# 小图标的路由
# 在打开网页的时候，浏览器会默认去请求跟路径+favicon.ico作为网站标签的小图标
# send_static_file 是flask 去查找指定的静态文件所调用的方法

@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')


